Vue I18n Prototype Pollution in `handleFlatJson`

Summary

Vue I18n is the internationalization plugin for Vue.js. @intlify/message-resolver and @intlify/vue-i18n-core are vulnerable to Prototype Pollution through the entry function: handleFlatJson. An attacker can supply a payload with Object.prototype setter to introduce or modify properties within the global prototype chain, causing denial of service (DoS) a the minimum consequence. Moreover, the consequences of this vulnerability can escalate to other injection-based attacks, depending on how the library integrates within the application. For instance, if the polluted property propagates to sensitive Node.js APIs (e.g., exec, eval), it could enable an attacker to execute arbitrary commands within the application's context.

Timeline

1. Mar 7, 2025, 3:51 PM UTCCVE published
2. Mar 7, 2025, 5:59 PM UTCCISA SSVC assessment

   Exploitation: poc · Automatable: yes · Technical impact: total

3. Mar 7, 2025, 6:00 PM UTCRecord last updated

Affected versions

• intlify vue-i18n

  From 9.1.0 · fixed in 9.14.3; From 10.0.0-alpha.1 · fixed in 10.0.6; From 11.0.0-beta.0 · fixed in 11.1.2

• @intlify/message-resolvernpm

  From 9.1.0 · fixed in 9.1.11

• @intlify/vue-i18n-corenpm

  From 9.2.0 · fixed in 9.14.3

• petite-vue-i18nnpm

  From 10.0.0 · fixed in 10.0.6

• vue-i18nnpm

  From 9.1.0 · fixed in 9.14.3

• @intlify/core-basenpm

  From 9.1.0 · fixed in 9.1.11

• @intlify/corenpm

  From 9.1.0 · fixed in 9.1.11

• @intlify/vue-i18n-corenpm

  From 10.0.0-alpha.1 · fixed in 10.0.6

• @intlify/vue-i18n-corenpm

  From 11.0.0-beta.0 · fixed in 11.1.2

• petite-vue-i18nnpm

  From 11.0.0-beta.0 · fixed in 11.1.2

• vue-i18nnpm

  From 10.0.0-alpha.1 · fixed in 10.0.6

• vue-i18nnpm

  From 11.0.0-beta.0 · fixed in 11.1.2

References 2